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Updated: Feb 11, 2026
09:01
High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
Published on: April 16, 2017
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Luminescent amine sensor based on europium(III) chelate
Nataliya V Petrochenkova1, Anatolii G Mirochnik2, Tatyana B Emelina2
1Institute of Chemistry, Far East Branch of Russian Academy of Sciences, Vladivostok 690022, Russia; Nevelskoy Maritime State University, Vladivostok 690059, Russia.
Summary
Methylamine vapor enhances europium luminescence in thin-layer chromatography. This occurs by forming a rigid structure that reduces the negative impact of water molecules on the europium complex's light emission.
Area of Science:
- Analytical Chemistry
- Materials Science
- Photochemistry
Background:
- Europium (Eu(III)) complexes are known for their luminescent properties, often utilized in sensing applications.
- Luminescence intensity can be significantly affected by the surrounding chemical environment, particularly by vibrational modes of ligands and solvent molecules like water.
- Thin-layer chromatography (TLC) provides a platform for immobilizing and analyzing chemical species.
Purpose of the Study:
- To investigate the effect of methylamine vapor on the luminescence of Eu(III) tris-benzoylacetonate immobilized on TLC plates.
- To elucidate the mechanism behind the observed changes in luminescence intensity upon exposure to methylamine.
- To explore potential applications in chemical sensing based on luminescence modulation.
Main Methods:
- Immobilization of Eu(III) tris-benzoylacetonate complex on thin-layer chromatography plates.
- Exposure of the immobilized complex to methylamine vapor.
- Measurement of luminescence intensity changes.
- Infrared (IR) spectroscopy for structural analysis.
- Quantum chemistry calculations to support mechanistic interpretation.
Main Results:
- Exposure to methylamine vapor led to a significant increase in the luminescence intensity of the Eu(III) complex.
- IR spectroscopy and quantum chemistry calculations suggested a mechanism involving the coordination of methylamine and water molecules to the Eu(III) ion.
- A rigid structural fragment, including the europium ion, water, and methylamine, was proposed to form.
- This structural change was shown to decrease the influence of hydroxyl (OH) vibrations on the luminescence, thereby enhancing it.
Conclusions:
- Methylamine vapor acts as a luminescence sensitizer for Eu(III) tris-benzoylacetonate immobilized on TLC plates.
- The sensitization mechanism involves the formation of a rigid complex that mitigates luminescence quenching by water.
- This finding highlights the potential of using such immobilized complexes for sensitive detection of analytes like methylamine.
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